Article adapted to be used as light reflector



H. FORD. T0 BE USED AS LIGHT REFLECTOR, VASE, 0R THE LIKE.

AmlcLmD/mfn APPLICATION FILED MN. l5, |919. l

Patented Aug. 19, 1919.

UNTTED sTATEs PATENT -oiiiiicn. 'l

Hennig Roan, or' U'rToxETiia, ENGLAND.

A a'ircnn ADAPTED To mi USED As LIGHT-numeros., vasn, on Tim LimaSpecification of Letters Patent.

Patented Aug. 19, 1919.

Application mea January-is, 191e. semi No. 72.2151.

(or molding articles such as light reflectors orshades, vases or thelike, or decorative slabs for partitions, wall or ceiling covering,columns, pilasters, cornices, pedestals or the like.y

Broadly, according to this invention A pieces of alabaster or gypsum areprovided which may be `of varying or uniform sizes.

To providea uniform'size the pieces may for this purpose be passedthrough a sieve or the like. The pieces are thoroughly mixed togetherwith a suitable cement or other adhesive to form a composition or mass.Before the composition solidifies, the same may be poured into molds ofthe required shape, or the composition in the liquid or plastic form maybe rolled or pressed into slabs or columns or other desired form..

The pieces of alabaster or gypsum may be reduced by lbreaking or millingor the like into granular form of the desired sizes which may beregulated by screening or the like.

The sizes of the gypsum chips will vary according to the work for whichthey are to be employed, and may vary from the granular form for smallerwork up to the size of a brick for larger work, slabs and the like,

l and may be irregular, or of regular cubic form.

The gypsum chips may be colored before mixing `or be left in naturalcolor'.

Any kind of cement may be employed, for example, Keenes,lParian orMartins, the latter being a composition having gypsum for its basis andconsisting of a mixture of acid and alkali with gypsum, the same beinggoods semi-transparent if desired, or may be colored according torequirements.

Pressure may in some cases be employed upon the .mixture or ycompositioni the `molds not only to insure that the mold is completely filled, butto give a greater density in solidifying to the composition.

When .the material hasihardened in the' mold or in the mass it maybeturned and polished, or if in slabs for decorative purposes, it isolished in any known manner.

The resu ting article or new manufacture has a very pleasing anddecorative appearmce, and the cost of productionis relatively Electriclight bowls, shades or reflectors may be produced in any suitableshape'and relatively thin, and of a .very effective appearance. y

Any suitable work of the kind such as is usually executed in marbleslabs, pillars or the like can be produced in this composition at aconsiderably less cost and can be given an equal polish; the effect isnovel and highly decorative.

Reference should be made to the accompanying sheet of drawings in whichare shown some examples of, the manufacture according to this processand composition.

Figure 1 is a plan of a rectangular slab of the finished material asmade with Keenes cement, and with pieces of gypsum dfirregular size, thefront surface of the slab is prefsA erably polished in a, like manner'to that usually employed in polishing alabaster. When such a slab isemployed Ifor walcico-4 ration the! back surface is left unpolls Fig..Qfrepresents a similar slab made with screened pieces of gypsum, andKeenes or other suitable cement, which pieces may be colordartificially. or naturally coloredpieces may be employed, for example,such as are red, pink, and amber. For wall or ceiling covering purposes,this slab will have only one surface polished, but if used as a screenor the like, both surfaces are polished. When employed for indirectlighting also, both surfaces are polished. Panels of this kind polishedon both surfaces having a light or lights secreted behind them transmitlight in the desired diffused manner, producing a verv pleasing anddecorative effect.

Fig. 3 represents a cubic mass of the solidified composition, thecomposition havingl been poured into a mold of this `form. The

setting may be subjected to pressure either by means ofa head of wateror by a pump.

Fig. 4 `represents a` pilaster made with this composition.- It ispreferably molded in three separate parts, the ttop or `cc` rniceportion, the rectangular central portion and the pedestal portion. l

Flg. 5 represents abowl as used for indl-` rect or dii'used lightingpurposes. The bowlA as shown is formed `of irregular pieces of gypsumwith Keenes cement, as prevlously described.` When set it is removedfromthe mold and turned -up in a lathe and polished in like manner tothat employed with alabaster. A brass beading or ring is then secured tothe edge of the bowl `having threer lugs to which to attach the chainsas usu A ally employed for bowlsused for indirect lighting.

F ig. "6 represents a bell reflector of ordinary or usual Shape or form,made of irregu- -lar pieces of gypsum according to this invention. Byplacing the light, electric for example, well within the bell, thereflector serves not only to reflect light directly downwardly but alsoto transmit'difl'used light through the semi-transparent walls of thebell.

The letter A represents irregular pieces of alabaster' or gypsum on allthe figures and B the cement, while A1 indicates the cubic -or moreregular pieces of alabas'ter in Fig. 2. The lines C in Fig. 3 indicatethe saw cuts in the cubic mass by which the cube of preferably yhardercomposition as previously described is divided up into vslabs or plateswhich are afterwardpolished on one face for wall covering purposes.

In Fig. 4, E ,represents the rectangular `centralslab ofthe pilaster andD and F the `top and bottom portions thereof respec` p tively.

' In Fig. 5, G yrepresents the chains for supporting the bowl used fordii'used or indirect lighting, and H, the metallicv beading ysurrounding the lip of the bowl with which are formed the lugs to whichthe chains are secured.

' I am aware that plasters and plastic materials containing alabaster orgypsum burnt A or unburnt, together with cement or other materials havebeen proposed for plastering i` "miam diffuser composed of a solidifiedcompound consistingof piecesofsolid material, and a binder,thelatterbeing translucent when set.

As a new article of manufacture, a light diliuser composed of asolidified `compound consisting of irregular pieces of solid material,and a binder, the latter being translucent when set.

3. As a new article of manufacture, alight diiiuser composed of asolidified compound consisting ofpieces of gypsum, and a binder, thelatter being translucent when set.

4. As a new article of manufacture `for light 'diffusing purposes,composed of pieces 'of solid materialthoroughly mixed with a cement andmolded into the desired form.,

the cement being translucent in the resultant set mass.

5. As a new article of manufacture, a light dili'user composed of piecesofvtranslucent material thoroughly mixed with a binder,

the latter also being translucent when set.

. 6.- As anew article v of manufacture for light diffusing purposes,composed of pieces of colored material thoroughly mixed with a cementand molded into the desired form, the, cement being translucent in theresultant set mass.

7 As a new article of manufacture for light diffusing purposes composedof pieces of differently colored material thoroughly mixed with a cementand molded into the desired form, the cement beingtranslucent in theresultant set mass.

8; As a new article ofA manufacture for light diffusing purposes,composedof pieces Aof differently colored gypsum thoroughlymixed with acement and molded into the desired form', the cement being translucentin the resultant set mass. f

l HARRY FORD. Witnesses MARJORY G. ROLLIN, Trios, H. COOK.

